Power operating mechanism for typewriters or like machines



Sept. 18, 1951 w. H. KUPPER POWER OPERATING MECHANISM FOR TYPEWRITERS 0R LIKE MACHINES 2 sheets-shet 1'' Filed Feb. 5, 1948 INVENTbR will/am If ATTORNEYS Sept. 18, 1951.

W. H. KUPPER POWER OPERATING MECHANISM FOR TYPEWRITERS OR LIKE MACHINES 2 Sheets-Sheet Filed Feb. 1948 IN IENTOR I [Ill/ham h. KuPPer Ma JW @AHQRNEY;

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A 55 IiIInmMwN 4 v H Patented Sept. 18, 1951 POWER OPERATING MECHANISM FOR TYPEWRITERS OR LIKE MACHINES William H. Kupper, West Hartford, Conn., as-

signor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Application February 3, 1948, Serial No. 6,066

20 Claims.

This invention relates to power operating mechanism for typewriters or like machines, and more particularly to mechanism of the class referred to in which a continuously moving, driving member, e. g., a rotor or toothed snatch bar, normally disconnected from parts to be actuated, is adapted to be connected operatively to such parts under control of keys or other manually operable means. 1

1 Mechanism having some structure generally resembling the structure shown in the present application is disclosed in the co-pending application of John J. Kittel, Serial No. 607,293 filed July 2'7, 1945, now Patent No. 2,474,741, dated June 28, 1949.

An object of the invention is to provide a mechanism of this kind which is of novel and improved construction and which has new and desirable operating advantages.

-Another object of the invention is to provide improved key-controlled drive-transmitting connections and controlling means for enabling a drive-transmitting interponent, such as a pawl, to be moved certainlyand quickl into complete and positive driving engagement with the continuously moving driving member, without any possibility of causing only a partial engagement of the interponent and driving member, with consequent scra ing or rasping of the parts.

A further and important object of the inven= tion is to provide an im roved mechanism of the character referred to which has the advantage that depressing and then lifting a typing or control key when the driving member is not operating will not leave the drive-transmitting connections operatively coupled to or engaged with the driving member.

Other objects will become apparent from a reading of the following description, the appended claims, and the accompanying drawings, in

which: I

Figure 1 is a fragmentary, vertical, fore-andaft sectional view of typewriting machine mechanism embodying the invention, some parts bein shown in elevation;

Figure 2 is a fragmentary view, partly in section and partly in elevation, showing a part of an actuator and associated drive-transmitting connections on an enlarged scale;

Figure 3 is a detail perspective view of an interponent controlling trigger;

Figure 4 is a vertical fore-and-aft sectional view of another structural form of typewriting machine mechanism embodying the invention, some parts being shown in elevation;

Figure 5 is a detail perspective view of a pawlcontrolling trigger included in the construction shown in Figure 4; and

Figure 6jis .a fragmentar vertical sectional view of part of the mechanism shown in Figure 4, drawn on an enlarged scale, part of a pawlrestrainingitrigger being omitted in order that other parts may be disclosed more clearly.

FORMHSHOWN IN FIGURES 1T0 3 The invention may be embodied in power mechanism for operating various parts of a typewriting machine or other machines having typing mechanism, e. g., printing adding machines, calculators, or the like. Typewriting machine parts which may advantageously be operated by power include the type bars, the carriage return mechanism, the back spacing mechanism, the line spacing mechanism, the case shift mechanism, and the tabulating mechanism. For the purposes of illustration,- a preferred form of power mechanism embodying the invention is illustrated in connection with type bar mechanism adapted to be operated by the power mechanism. The drawing shows'only a few conventional typewriter parts to assist in understanding the co-relating of power mechanism embodying the invention with other or conventional parts of a typewriter. The conventional parts shown include a frame A on .which a carriage B is mounted for letter spacing and return travel in the usual manner. A printing platen or cylinder C is supported on the carriage B. A type bar I is pivoted at 2 on a frame-mounted segment 3. The heel of the type bar I is connected by a link 4 to a front lever 5 which is pivoted at 6 on a frame cross bar or mounting rail l. A link 8is connected at its front end to the lever 5, and at its rear end is formed with a hook 9 which receives a universal bar 10 forming part of a rocker frame I I pivoted as at [2 on a bracket carried by the frame A. A spring 13, connected between the front end portion of the link 8 and a spring anchor plate l4, yieldably maintains the type bar in its inactive position with its head resting on a cushion 15, as shown in full lines in Figure 1. The structure shown also includes a key lever mounting rail or bar I 6 and a key lever cushion abutment I1, .both of which are carried on the main frame.

The parts described so far are generally similar in construction and relative arrangement to the construction and relative arrangement of conard typewriter. The present invention relates to other parts to be described later, and to the combination or relative arrangement of such other parts with the conventional parts referred to. Although only one type bar and associated set of operating connections are illustrated in the drawing, it will be understood that, in practice, the invention is embodied'ina complete machine including a plurality of type bars. The other type bars (not shown) and their associated operating connections are similar to the type bar I and its operating connections. Inasmuch as the whole set of type bars of a complete machine is pivoted on an arcuate segment, some of the operating connections, such as the counterpars of the links 4 and levers 5, may vary in dimensions; but the general arrangement and operat ing principle are the same with respect to each type action. Accordingly, a description of the present invention, as applied in connection with the single illustrated type bar I, will serve also as a description of the application of the invention to the'several type bars in a complete machine.

Power mechanism forming' part of or used in connection with apparatus embodying the'invention includes a driving element which operates continuously, and controllable driving connections which normally are inoperative or ineffec tive but which may be'conditioned by the operator to effect operative driving connection between the continuously moving driving member and the type bar I. In the mechanism shown in the drawing, the driving memberis constituted by a continuously rotating element, more particularly a toothed snatch roll or bar I8, which may be of known form, and which is adapted to be driven in the direction of the arrow a in'Figure 1 by any suitable prime mover such as an electric motor (not shown).

The connections for transmitting drive from the driving member ill to the type bar I include an actuator I9 which extends fore-andaft of the typewriter and above the member I8. The actuator is formed with a downward extension which is pivoted as at 2| to the front lever 5, the pivot 2i being offset relatively to the pivot 6. A forwardly extending part 22 of the actuator I9 projects through a' slot 23 in a guide plate 24 mounted in'fixed relation to the frame A. The actuator I9 also includes a rearwardly extending part 25which' is disposed under an abutment or guide plate 26 carried by the frame A. A spring 21, interposed between the front end 22 of the actuator and an anchor plate 28 on the cross bar I6=, yieldably urges the actuator to rock clockwise, and thus normally maintains the actuator in the full lineposition shown in Figure 1 with its rear end 2'5 bearing against the abutment or guide plate 26. Another abutment'29, the purpose of which will be described later, is mounted below and in spaced relation to the abutment 26 so as to underlie the actuator rear end 25. The'abutment 29'is formed with a flat upper surface 39 and with a round bearing portion 3i suitably mounted or I journaled to enable the abutment 29 to be adjusted about an axis parallel to the axis of rotation of the driving member I8.

In order to drive the type bar I to the printing position shown in dotted lines in Figure 1, the actuator I9 is operatively but indirectly connected to the driving member I8, the actuator it'- self never engaging. the driving member; Mechanism for bringing aboutthe operative-connectionof the actuator I9 to the member." I8'in;-

eludes an interponent pawl 32 which is pivoted as at 33 on the actuator. A spring 34, anchored to the actuator I9 and connected to the lower end of the pawl 32, urges the latter to rock clockwise so as to move its nose 35 into engagement with the snatch roll I8. Normally, the pawl is maintained out of engagement with the snatch roll by therestraining action of a control element or trigger 36 which is pivoted as at 31 on the actuator I9. In the normal position of the trigger, shown in full lines in Figure 1, its front end 38 engages a holding surface 39 on the pawl so as to prevent the spring 34 from rocking the pawl into drive-transmitting engagement with the driving member l8. The pawl 32 is formed with an inclined cam face 40 which is located just below the holding surface 39, and which is acted upon by the trigger, in a manner to be described later, for rocking the pawl counterclockwise and thus re-setting it in normal, inoperative position. Movement of the trigger" 35 about its pivot 31 is limited by stop pins 4iand 42 on the actuator I9.

Key controlled means is provided for bringing about operative driving connection between the member i8 and the actuator I9. This means includes a key 43, pivoted as at 44 on the cross bar I6, and having a heel or rear end portion 45 which underlies and engages a lug or horizontally extending ear 46 at the upper end of the arm 41 of an operating lever 48' which is pivoted at 49 on the bottom of the cross rail IS. The operating lever 48 extends through the guide slot 23, and is urged downwardly or counterclockwise by a spring 50 connectedbetween the lever 48 and the guide plate- '24. A limber dog or flipper 5|, pivoted as at 52 on the lever 48, is yieldably held by a spring 53 against a stop 54 on the lever 48. The arrangement is such that the dog 5I can swing clockwise from the position shown in Figure 1, but can not move counterclockwise beyond this illustrated position. The upper end of the. limber dog 51- is curved and normally underlies a headed pin 55 2 on the actuator I9.

Operation Normally, the parts will be in the positions illustrated in full lines in Figure l, and the driving member I9 will be rotating in the direction of the arrow (1. In order to cause the type bar I to be driven to printing position, the key 43 is depressed. The heel 45 of the key, acting on the lug 49, will raise the lever 48, that is, rock it clockwise, so as to cause the flipper 5| to press upwardly on the pin 55 on the actuator I9. In this manner, the actuator is initially rocked counterclockwise about its pivot 2! to an extent sufiicient to move the lower part of the rear end of the trigger 35' against the abutment surface 30, thereby rocking the trigger clockwise about its pivot- 31 and causing the trigger end 38 to move oil and below the holding face 39 of the pawl 32. This releases the pawl from the restraining action of the trigger, and enables the spring 34 to rock the pawl 32 quickly so as instantaneously to bring the pawl nose 35 into complete and effective drive-transmitting connection with the driving member I8; as'shown in dottedlines in i ure 1. Inasmuch as the pawl is moved by spring action, as distinguished from being moved manually into engagement with the snatch roll I8, there is no possibility of moving the pawl nose 35 just barely into the path of the teeth on the snatch roll. Thus, once the key 43 has been plate 26.

pawl-releasing position, the pawl 32 will snap immediately and completely f into the effective drive-transmitting position shown in dotted lines in Figure l.

The pawl 32, and with it the actuator I9, then will be driven toward the left, as viewed in Figure 1. Consequently, the actuator pivot 2| will be moved so as to rock thefront lever 5 clockwise about its pivot 6, thereby pulling forwardly on the link 4 and moving the type bar I toward printing position. After a predetermined movement of the actuator and the pawl as a unit, they will be thrown or cast eif by the momentum of the moving parts to free the pawl from the driving member I8, whereupon the spring 21 will rock the actuator clockwise to move its rear end portion 25 upwardly into engagement with the guide Upward movement of the actuator rear end portion 25 will also bring the top part of the rear end of the trigger 36 into engagement with the trigger re-setting means 26, thus rocking the trigger counterclockwise about its pivot 31. This will cause the trigger front end portion 38 to bear against the pawl re-setter cam device 40, thereby rocking the pawl 32 to position its nose 35 vwell above the level of the "driving member I8.

The rocking of the trigger 36 will be suflicient to move its end 38 into restraining position in contact with the holding surface 39 on the pawl 32. The spring 21 will then move the actuator III forwardly to its initial position. This movement of the actuator I9, and the pulling action of the spring I3, will move the type bar I to its position of rest, thus completing an operating cycle.

In order to provide for adjusting or regulating the timing of the connection of the pawl 32 to the driving member I8, and the re-setting of the pawl in restrained position, the rear end of the trigger 36 is so made that its opposite sides may be deformed as by pressing, bending or mauling to vary the positions the several parts will occupy when the trigger rear end engages the abutments 30 and 26. Preferably, the trigger rear end is formed as an opening circle with a peripheral split 58 dividing the circle into bifur- 4 cations or parts '51 and 58; The parts 51 and 58 may be bent, pressed, or mauled individually so as to effect the desired adjustment of the timing of the associated parts.

It may be desirable also to adjust simultaneously the timing of the throw-off points of all of the pawls 32 of a complete machine. This may be accomplished by rotating the stop 29 so as to vary the inclination of the abutment face 30.

If the key 43 were to be held down, no repeat operation of the actuator I Band associated mechanism would take place. -Holding the key depressed would hold the flipper dog 5| up in its actuated position; but, upon return or forward movement of the actuator I9, the pin 55 could merely rock the dog 5| idly about its pivot 52 against the urge of its spring 53. Subsequent releasing of the key 43 would lower the dog 5| and enable the spring 53 to move the dog back under the pin 55 and against the stop 54, in readiness for the performance of another operation.

A particular advantage. of constructions embodying the present invention, is that, in the event a key is depressed when the driving member I8 is not operating, and the key is then released, the associated paw1-32 which will move into engagement with the. member I8 upon depression of the key, will be moved out of engage- 6 ment with the member I8 in response to the return movement of the key.

In the use of power operated typewriters, it sometimes happens that several operating-keys are depressed while the driving member is not operating. In some prior constructions, .when this is done and the depressed keys are released, they return to normal position, but the drivetransmitting connections remain operatively coupled to the driving member. When the driving member is started, it will either stall the motor, or will break a part, or will simultaneously start to drive all of the type bars associated with the driving connections which were enabled bydepression of the keys. Simultaneous actuation of a plurality of type bars causes them to janrv and lock, necessitating the servicing of the machine in a manner which cannot usually be perfdr'med by the ordinary typist or machine operator.

If the key 43, or any number of counterpart keys of a machine embodying the present invention, should be depressed when the member I8 is not operating, the associated parts would be moved in the manner previously described for bringing the noses 35 of the pawls 32 intp' engagement with the snatch roll I8. However, immediately upon return movement of the keys 43, the rear end parts 51 of the respectively associated triggers 36 would engage the abutment-28 to .thereby'rock the triggers 36 counterclockwise,

and re-set the pawls 32 in restrained positions out of engagement with the member I8. i-Consequently, no ill effect can follow the depression and release of any number of keys 43 when the driving member I8 is not operating.

FORM SHOWN IN FIGURES 4 To 6 carriage IO0B. A type bar IN is pivoted at. I02

on a frame-mounted segment I03. The heel of the type bar IOI is connected by a link I04 to a lever I05 which is pivoted at I08 on a {frame cross bar or mounting rail I0I. A link "I08 is connected at its front end to the lever I05; and at its rear end is formed with a hook I09 'which embraces a universal bar II 0 forming part of a rocker frame I II pivoted as at I I2 on a bracket carried by the frame IO0A. A spring 3;; connected between the front end portion of the link I08 and a spring anchor plate II4, yieldably maintains the type bar in its inactive position with its head resting on a, cushion II5, as shown in full lines in Figure 4. Also shown are a; key

'lever mounting. rail or bar I I6 and a keygrlever guide I I1, both of which are carried on the main frame IO0A.

Figure 4 shows only one type bar, but it will be understood that, in practice, the invention is embodied'in a machine including a plurality of type bars which may be similar to the type .bar IOI.

ably increase from the center towards thefiends of the segment. The numeral I05 designates driving member 'I I8. 'with an inclined cam face I 46 which is locatallever at-the center, and the numeral I85 designates a lever at the end of the segment. in-

'--termediate levers, not shown, increase in length progressively from the lever I to-the lever Power mechanism includes a driving element :which operates continuously, and controllable form, and which is adapted to be driven in the :direction of the arrow ain Figure 4 by any suitable prime mover. I

The connections for transmitting drive from #the-driving member I I8 to the typebar vIllI in- .clude an actuator I I9 which, extends fore-'and-aft 'of'the typewriter and above the member H 6. The actuator extends through a comb guide I2Iland is pivoted as at I2I to the lever I65 at a point ofiset relatively to the pivot I06. Theactuator .hasa forwardly extending part I23 projecting qunder an abutment or guide plate I24 mounted by screws I26 on the frame IDOA to extend parallel to: the snatch roll IIB. A spring I21, interposed between the front end of the actuator I I9 and :an anchor plate I28, yieldably urges the actuator .to; roc k clockwise, and thus normally maintains the actuator in the position shown in Figure 4 withits front end part I23 bearing-against the abutment or'guideplate I24. Another abutment I29 is disposed below the abutment I24 so as to underlie the actuator front end part I23. The

.abutments 124 and I29 are formed with fore-and- :aftextending slits providing a plurality of separate abutment portions which are adapted to be adjusted separately bybeing bent vertically.

Inorder to drive the type'bar IN to the printing'position'shown in dotted lines in Figure 4,

:the actuator I I9 is operatively but indirectly connected to the driving member II8, the actuator itself never engaging the driving member. Mechanism for bringing about the operative connection .of the actuator I'I9 to the member II8 includes-an interponent pawl I32, which is pivotedas at I33 on the actuator. A spring I34,

anchored to the actuator H9 and connected to the pawl I32, urges the latter to rock clockwise 'so as to move its nose into engagement with the snatch roll II8. Normally, the pawl is maintained out'of engagement with the snatch roll by the restraining action of a control-eleengages a holding surface I39 on the pawl so as 'to'prevent the spring I34 from rocking the pawl into drive-transmitting engagement with the The pawl I32 is formed ed .just below the holding'surface I39, and which is acted upon by the trigger for rocking the pawl counter-clockwise, and thus re-setting it in normal, inoperative position.

Key controlled means is provided for bringing about operative driving connection between the member II6and the actuator II9. This means includes a key I43 pivoted as at I44 on a rod carried by the cross bar H6. The key I43 has an upward projection I45 disposed behind an arm I46 of an operating lever I41, pivoted as .of rest against a limit stop I54.

rods, one disposed above the other.

:8 at I48 on another frame-mounted cross bar I49. The lever I41 has another arm I50 on which ea-limber dog or flipper I5I is pivoted at I52. A

spring I 53urges thelimber dog I5I to rock clockwise to yieldably retain it in'its normal position The dog .I5I can swing counter-clockwise from the position shown in Figure 4, but cannot move clockwise from this position. A returning spring I55, interposed between the key lever I43 and a short arm I51 on the lever I41, yieldably holds the lever I41 in its normal position with afourth arm I58 of the lever I41 engaging the cross bar I49. In the normal position of the parts, the lower end of the limber dog I5I overlies ,a contact surface I59 on the actuator I19.

It will be observed that the mechanismshown in Figures 4 to 6 is similar in many respects to that shown in Figures 1, 2, and '3. The mQdes .of'operation of the two embodiments of the invention are, in general, the same so'that no detailed description of the operation of the con- "tor III! downwardly, whereupon the trigger I36 releasesfthe pawl I 32 which then engages -the snatch roll II8. When the pawl I32 is cast of! from engagement with the snatch roll H6, the trigger I36 is rocked to move the pawlback to its normal position, and the other parts arereturned to their normal positions by the spring II'3, I21, and I55.

In order to avoid congestion and possible interference of the key leversand the front levers I41, it is preferable to mount the key levers in two sets to rock about two separate pivot Thus far only one set of key'levers I43 has been referred to as being mounted to rock on the'pivot rod I44.

The extensions I45 of the key levers I43 are formed with lateral projections I engageable with the arms I46 on the front levers I41 at points which are relatively low, or relatively far from the pivots I48 of the levers I41.

The key levers I43 of the second set of key 'levers are pivoted to rock about a rod I44 on'the frame mounted bracket I I6 above the lower pivot rod I44. The key levers I43 have upwardly extending arms I66 which are 'formed with lateral projections I6-5 adapted to engage associated lever arms I46 at points above the level 'of engagement of the lateral projections I65 on the -key levers I43 with their associated lever-arms ing drawings and-description embody the inventionin preferred forms; but changes may be made in the construction and relative arrangement 01 some of the parts without departing from the invention as defined in the claims.

I claim:

1. In power operating mechanism for a typewriter or like machine, a driving member; an actuator; an interponent mounted on said actuator formovements into and out of operative engagement with said driving member and being biased to move into engagement therewith; a trigger normally maintaining said interponent disengaged from said driving member; akey; means responsive to .depression of said key "for ment with said driving member and being biased to move into engagement therewith; a trigger pivotally mounted on said actuator and normally maintaining said interponent disengaged from said driving member; a re-setting cam face on said interponent; a key; and means responsive to depression of said key for rocking said trigger in one direction about its pivot for releasing said interponent to enable it to move into engagement with said driving member, and responsive to return movement of said key when said driving member is at rest for rocking said trigger reversely to move a part of said trigger against said re-setting cam face and thus move said interponent from engagement with said driving member.

3. In power operating mechanism for a typewriter or like machine, a driving member; an actuator; an interponent pivotally mounted on said actuator for movement into and out of operative engagement with said driving member and being biased toward operative engagement position therewith; a re-setting cam face on said interponent; a trigger normally holding said interponent disengaged from said driving member; a key; and means responsive to depression of said key for actuating said trigger to release said interponent and enable it to move into engagement with said driving member, and responsive to return movement of said key when said driving member is at rest for moving said trigger reversely to move a part of said trigger against said resetting cam face and thus move said interponent from engagement with said driving member.

4. In power operating mechanism for a typewriter or like machine, a rotatable toothed driving member, an actuator; means mounting the actuator to move and operatively connecting it to a part to be actuated; an interponent pawl movably mounted on said actuator; a spring urging said pawl toward engagement with said driving member; a trigger on said actuator normally maintaining said pawl disengaged from said driv ing member; key controlled means for actuating said trigger in one direction to release said pawl and enable it to be moved into engagement with said driving member, whereby said pawl and said actuator will be moved together until their travel as a unit moves said'pawlout of engagement with said driving member; and a device engageable by said trigger after disengagement of said pawl from said driving member for moving said trigger in the reverse direction for re-setting said pawl in its normal position.

5. In power operating mechanism for a typewriter or like machine, a rotatable toothed driving member; an actuator; means mounting the actuator to move and operatively connecting it to a part to be actuated; an interponent pawl movably mounted on said actuator; a re-settingcam on said pawl; a spring urging said pawl toward engagement with said driving member; a trigger on said actuator normally maintaining said pawl 10 disengaged from said driving member; key-controlled means for actuating said trigger in one direction to release said pawl and enable it to be moved into engagement with said driving member, wherebysaid pawl and .said actuator will be moved together' until their travel as a unit moves said pawl out of engagement with said driving member; and a device engageable by said trigger after disengagement of said pawl from said driving member for. moving said trigger in the reverse direction to cause a part of said trigger to press against said re-setting cam and thus return said pawl to its normal position.

6. In power operating mechanism for a typewriter or like machine, a rotatable toothed driving member; a part to be actuated; means pivotally mounting said part at one side of said member to rock about an axis parallel to the axis of rotation of said member; an actuator extending over and fore-and-aftof said member; means pivotally' mounting said actuator on said part at a point ofiset from the pivotal mounting of said part; a guide at the opposite side of said driving member; a spring urging said actuator to rock about its pivot to yieldably hold a portion of said actuator at said opposite side of said driving member in contact with said guide; a pawlpivotally mounted on said actuator; a spring urging said pawl to rock into engagement with said driving member; a trigger pivotally mounted on said actuator ;'an abutment at said opposite side of said drivingmember; and key controlled means for rocking said actuator to move said trigger against said abutment to rock said trigger and thus release said pawl and enable the latter to be moved by its associatedspring into engagement with said driving member.

7. In power operating mechanism for a typewriter or like machine, a rotatable toothed driving member; a part to be actuated; means piv otall mounting said part at one side of said member to rock about an axis parallel to the axis of rotation of said member; an actuator extending over and fore-and-aft of said member; means pivotally mounting said actuator on said part at a point offset from the pivotal mounting of said part; a guide at the opposite side of said driving member; a spring urging said actuator to rock about its pivot to yieldably hold a portion of said actuator at said opposite side of said driving member in contact with said guide; a pawl pivotally mounted on said actuator; a spring urging said pawl to rock into engagement with said driving member; a trigger pivotally mountedon said actuator; an abutment at said opposite side of said driving member; a key-controlled operating lever mounted at said opposite side of said drivin member; a limber dog-pivoted on said lever; and a part on said actuator positioned to be engaged by said dog when said lever is rocked for thereby rocking said actuator to move said trigger against said abutment to rock said trigger and thus release said pawl and enable the latter to be moved by its associated spring into engagement with said driving member.

8. In a power operating mechanism for a typewriter or like machine; a rotatable driving member; a movably mounted actuator; an interponent mounted movably on said actuator; a spring urging said interponent to move into drive-transmitting engagement with said driving member; a trigger mounted movably on said actuator and normally occupying a position in which it maintains saidinterponent out of drive-transmitting engagement with said driving member; an abut- 1-H ment; andkey-controlledmeansior'imparting'to said actuator" suificien'tinitial movementto move said trigger'into engagement withsaid'abutme-n't to thereby move said trigger onsaidactuatorand release said interponent to enable the latter to be moved by said spring into drive 'transmitting en- 'gagement with saiddrivingmember.

:9. In a power operating mechanismdoratypewriter or like machine; a rotatable-driving mem- "ber; a movably'mounted-aetuator; an interponen-t mounted movably on said actuator; spring-urg- "ing said interponent tomovedntodrive transmitting engagement "with said drivin 'member; -a trigger mounted *m-ovabl-y on said actuator and normally occupying a position -in--which it maintains said interponen-toutof drive-transmitting engagement with said 'driv-ingmem'ber; an-abutment; andkey-controlled"means for moving said actuator-tomove said-interponent*toward but-not into engagement with said driving member and 1 simultaneously to =move--said triggerinto engagementwith said abutment to *thereby actuatesaid trigger to release said interponent and enable the latterto be moved "by said spring into d-rivetransmitting engagement with said driving mem- 1 simultaneously to -move said triggertintoiengagement withsaidabutment to thereby-actuatesaid trigger to release said interponent and enable the latter to be -moved said spring into .drivetransmitting engagementwith said driving mem- 'ber, whereby-saidflactuator is driven through said interponent-untilthelatter is thrownout of .engagem'ent' with said driving'member and ;a second-abutmentthen -engageable by said' trigger for returning the 'la'tter to-itsinitialiposition on said actuator.

11. Ina power operatingmechanism'for a typewriter or like 'machine, a driving member which moves continuously whenthe mac'hinesis in use; an actuator; and key-controlled means for normally maintain-in said actuator operativel-y-disc connected from said driving member and being operable 'foreffecting temporary driving connection of said actuator-tosaid driving member, said means including two spaced abutments :and a control element'having apart movable between said abutments, one side of said .part being engageable with one of saidabutments forzefiecting operative connection of said actuator to said-driving '-member, and the-other side of said part :being engageable with=the :other-of said abutments for restoring saidelement to itsnormalsposition.

12. In a power operating mechanism for a typewriter or like -machine; a rotatabledriving member; a movably mounted actuator; 'aninterponent mounted movably on said actuator; a spring urging said interponent .to move into drive transmitting engagement with said drivin member; a, trigger mounted -movably :on said actuator and normally occupying a position in which it maintains said interponent outof. drivetransmitting engagement with is thrown out of engagement Withsaid "driving member, the other of said abutment partsbeing then engageable by saidtriggerffor returning the latter to itsiinitial position on said actuator; and means mounting one of said 'a'butmentiparts'for bodily adjustment to *vary the relative :positions of said "two abutment part and thus 'vary'the timing of the triggerreleasing operation.

13. In power operating mechanismfor a 'typewriter or "like machine, .a rotatable'toothed driving member; a part to be actuated; -means pivotally mounting said part at one side'o'fsa'id member to rockabout an axis "parallelto'the axis of rotation of said *memberian "actuator extending over and fore-and-aft oi-said member; means pivotally mounting ,said actuator *onsai'd part at a point ofi'setirom' the pivotal'mounting of said part; ,a guide at the opposite'side of said driving member; a spring urging said actuator torock about its pivotto yi'eldab'ly holdaportion of said actuator ,at said opposite side 'of said driving member in contactwith said'guide; a pawl pivotally mounted 'on said actuator; a spring urging said pawlto rockintQ engagem'ent with said driving member; a trigger pivotally mounted on said actuator; :a flat :surface a'butment engageable by said "trigger upon rocking of said actuator and being mounted at said'oppositeside of said memberfor adjustmentabout an axis parallel '.to the axis of rotation of said driving member; and :key controlled means for rocking said actuator 'to move said trigger against said abutment to :rock said trigger and thus release said pawl and enable the latter to be moved by its associated springintoengagement with said driving member.

lei/In a power operating mechanism *for a typewriter or like 'mac'hine, -a driving member which moves continuously when "the -machi-ne is in use; an actuator; and key-rontrolled-ineans I01 normally maintaining said actuator operatively disconnected fromsaid :drivin member and being operable "for effectingtemporary driving connection of said :actuator-to said dri-ving member, said means'in'cluding two-spaced-abutmerits and a control :element having-a'pa-rtmovable between said abutments, one side of said part "being enga eable with one of said 'abutment for effecting operative connection of said actuator 'to. said driving unember, "and the other side: of. said-partbeing 'engageabie-with the other of said iabutments *for restoring said element -"to itsnormal positionysaid part of said control element being formed generally -as'an open circle with a peripheral split to render the opposite, abutment-engagin sides of said part deform able-for adjustments.

1'5jIn -a power operating mechanism for a typewriter or like :machine, a :driving :member which moves continuously when the machine .is in :use; :an actuator; eandykey tcontrolledzmeans for a normally maintainin .said .actuator operatively -disconnected zfrom .said driving :member and being operable for effecting temporary driving connection of said actuator to said driving member, said mean including two spaced abutments and a control element having a part movable between said abutments, one side of said part being engageable with one of said abutments for effecting operative connection of said actuator to said driving member, and the other side of said part being engageable with the other of said abutments for restoring said element to it normal position, said part of said control element being bifurcated to render the opposite abutment-engaging sides of said part deformable for adjustments.

16. In a power operating mechanism for a typewriter or like machine, a rotatable toothed driving member; a part to be actuated; means mounting said actuator to move and operatively connecting it to the part to be actuated; an interponent pawl movably mounted on said attuator and being responsive to initial movement of said actuator towards said driving member for engaging driving member to be operated thereby; and mean for efiecting such initial movement of said actuator comprising a, keyoperated lever, a limber dog pivoted on said lever and having an arcuate contact face, and a headed pin on said actuator normally out of contact with said arcuate contact face but being engageable thereby upon key-operation or" said lever.

17. In power operating mechanism for a typewriter or like machine, a toothed driving member rotatable about an axis extending from side-toside of the machine; a part to be actuated; means mounting said part to rock about an axis parallel to and in front of the axis of rotation of said member; and actuator extending over and foreand-aft of said member; means pivotally mounting said actuator on said part at a point in front of the axis of rotation of said driving member; a guide behind said driving member; a spring urging said actuator to move forwardly and to rock about its pivot to yieldably hold a portion of said actuator, behind said driving member, in contact with said guide; a pawl pivotally mounted on said actuator to rock about an axis behind said driving member axis of rotation; a spring urging said pawl to rock into engagement with said driving member; a trigger pivotally mounted on said actuator behind said pawl; an abutment behind said pawl engageable by said trigger upon rocking of said actuator; and key-controlled means in front of said driving member for rocking said actuator to move said trigger against said abutment to rock said trigger and thus release said pawl and enable the latter to be moved by its associated spring into engagement with said driving member.

18. In power operating mechanism for a typewriter or like machine, a driving member; an actuator; and interponent mounted on said actuator for movements into and out of operative engagement with said driving member and being biased to move into engagement therewith; a trigger normally maintaining said interponent disengaged from said driving member; a fiat surface abutment normally disengaged from said trigger; a key; means responsive to depression of said key for effecting relative movement between the actuator and the abutment for causing the trigger to be actuated by engagement with the abutment to release the interponent and enable it to move into driving engagement with said driving member; and means mounting said abutment for rocking adjustment to vary the timing of releasing of said interponent by said trigger.

19. In a power operating mechanism for a typewriter or like machine; a rotatable driving member; a movably mounted actuator; an interponent mounted movably on said actuator; a spring urging said interponent to move into drive-transmitting engagement with said driving member; a trigger mounted movably on said actuator and normally occupying a position in which it maintains said interponent out of drive-transmitting engagement with said driving member; an abutment; 2, key; and means responsive to depression of said key for imparting to said actuator sufficient initial movement to move said trigger into engagement with said abutment to thereby move trigger on said actuator and release said interponent to enable the latter to be moved by said spring into drive-transmitting engagement with said driving member, said key responsive means including a lever rockable upon key depression, and a limber dog pivoted on said lever and being operatively connectible with said actuator upon rocking of said lever by said key.

20. In a power operating mechanism for a typewriter or like machine; a rotatable driving member; a movably mounted actuator; an interponent mounted movably on said actuator; a spring urging said interponent to move into drive-transmitting engagement with said driving member; a trigger mounted movably on said actuator and normally occupying a position in which it maintains said interponent out of drive-transmitting engagement with said driving member; abutment means having two abutment parts; key-controlled means including a limber dog for moving said actuator to move said interponent toward but not into engagement with said driving member and simultaneously to move said trigger into engagement with one of said abutment parts to thereby actuate said trigger to release said interponent and enable the latter to be moved by said spring into drive-transmitting engagement with said driving member, whereby said actuator is driven through said interponent until the latter is thrown out of engagement with said driving member, the other of said abutment parts being then engageable by said trigger for returning the latter to its initial position on said actuator; and means mounting one of said abutment parts for bodily adjustment to vary the relative positions of said two abutment parts and thus vary the timing of the trigger releasing operation.

VV'ILLIAM' H. KUPPER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 580,741 Templeton Apr. 13, 1897 1,737,439 Stickney Nov. 26, 1929 1,899,968 Kurowski Mar. 7, 1933 2,362,138 Kavle Nov. 7, 1944 2,407,195 Von Reppert Sept. 3, 1946 

